DDIM sampling

[mathfirst]

I would like to use the DDIM version of your conditional ddpm version as a baseline in our work. Since our method, which is not a diffusion model, supports fast sampling, does your code support DDIM sampling? or you guys have written the corresponding DDIM code but have not put it in your repo? If not, could you please modify your code to support DDIM sampling? If you have no time to do that, could you please tell me which part of your code I should modify? Looking forward to your response.